Particles having positive charges occasionally come with high velocity from the sky towards the eart

Question

Particles having positive charges occasionally come with high velocity from the sky towards the earth. On account of magnetic field of earth near the equator, they could be deflected towards the\

Professor PC Thomas Classes · Answer

Apply Flemings Left hand thumb rule. Hold the first finger of left hand towards the north because the earths field is to the north. Direct the second finger downward because when the positively charged particle moves down, the current is downwards. Then you will see that the thumb is pointing east. Showing that the force is directed towards eastward.\ So a positively charged particle coming from above near the equator will be deflected eastward. If the particle is -vely charged it will be deflected westward. Charged particles reaching the earth near the poles will not be deflected at all, because their motion is parallel to the field\